Скачать или смотреть How to Enable ALLOW_NON_NUMERIC_NUMBERS with Jackson ObjectMapper 2.12

Discover how to correctly enable `ALLOW_NON_NUMERIC_NUMBERS` with Jackson ObjectMapper 2.12, avoiding deprecation warnings and compilation errors.
---
This video is based on the question https://stackoverflow.com/q/66886341/ asked by the user 'Aaron Digulla' ( https://stackoverflow.com/u/34088/ ) and on the answer https://stackoverflow.com/a/66887786/ provided by the user 'Aaron Digulla' ( https://stackoverflow.com/u/34088/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to enable ALLOW_NON_NUMERIC_NUMBERS with Jackson ObjectMapper 2.12?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Understanding the Problem: Enabling ALLOW_NON_NUMERIC_NUMBERS in Jackson ObjectMapper 2.12

When working with JSON parsing and serialization in Java using Jackson, you may encounter specific features that allow for greater flexibility in handling data. One such feature is ALLOW_NON_NUMERIC_NUMBERS, which permits the use of non-numeric values like NaN, Infinity, and -Infinity when parsing JSON. However, enabling this feature with Jackson ObjectMapper 2.12 can lead to some confusion due to warnings and compilation errors.

The Issue

In previous versions of Jackson, you could enable this feature using the following line of code:

[[See Video to Reveal this Text or Code Snippet]]

Unfortunately, this method now generates a deprecation warning in version 2.12.

Alternatively, attempting the code:

[[See Video to Reveal this Text or Code Snippet]]

will lead to a compilation error because JsonReadFeature.ALLOW_NON_NUMERIC_NUMBERS is not a subclass of any of the four Feature types that ObjectMapper supports.

The Correct Solution: Enabling the Feature Properly

Given these challenges, it’s essential to know the correct approach for enabling ALLOW_NON_NUMERIC_NUMBERS with Jackson ObjectMapper 2.12.

Steps to Enable the Feature

Use the Mapped Feature:

The key to successfully enabling this feature revolves around using the mapped feature from JsonReadFeature, which ensures that you won't encounter deprecation issues.

Here’s the correct line of code to achieve this:

[[See Video to Reveal this Text or Code Snippet]]

Important Note: The mappedFeature() method at the end of the enum is crucial. It allows Jackson to utilize the appropriate underlying implementation without triggering deprecation warnings.

Understanding the Context

Deprecation and Changes: As libraries evolve, certain features and methods become deprecated in favor of more efficient or cleaner implementations. This is a common scenario in software development, aimed at maintaining code quality and improving performance.

Jackson Implementation: Jackson provides multiple ways to handle JSON that cater to various needs. It's beneficial to stay updated with the latest library documentation to understand changes in the API that might affect your code.

Conclusion

Navigating changes in libraries like Jackson can be daunting, but understanding the correct methods to enable features is key to maintaining your codebase effectively. By following the outlined steps, you can successfully enable ALLOW_NON_NUMERIC_NUMBERS in Jackson ObjectMapper 2.12 without running into warnings or errors.

Feel free to reach out if you have further questions or need assistance with your implementation!